Yojika numbers your bills automatically so the series is neat and gap-free. You can see how it works in Settings under Transactions, in the Invoice numbering card.
What the card shows
- Financial year — the year your bills are numbered under, such as
2025-26. In India this runs from 1 April to 31 March. - This device’s series — the letter used for bills made on this device (see below).
- Issued this year — how many bills you have made this financial year.
- Next invoice — the exact number your next bill will get, for example
INV2025-26/0001.
How a bill number is built
A bill number is made of three parts:
prefix + financial year + running number — for example INV2025-26/0042.
- The prefix (
INV) is yours to choose — see Document prefixes below. - The financial year (
2025-26) is set automatically. - The running number (
0042) counts up by one with each bill.
Document prefixes
Every kind of document you make has its own number series and its own prefix. You can change all of them in the Document prefixes card, just below Invoice numbering:
- Sales — sales invoice (
INV) and credit note (CN). - Purchases — purchase bill (
PB) and debit note (DN). - Quotes & orders — estimate (
EST), proforma invoice (PI), delivery challan (DC), sale order (SO) and purchase order (PO).
Type a new prefix and click Save prefixes. Each box shows an example of the number it will produce, so you can see the result before you save.
Changing a prefix never changes documents you have already made. They keep the numbers they were given. The running number is not affected either: if your last estimate was EST2025-26/0002 and you change the prefix to QTN, the next one is QTN2025-26/0003 — the series carries on without a gap.
A prefix can be up to 6 characters and may use letters, digits and - _ . #. It cannot contain a space or a /, because the bill number already uses / to separate the year from the running number. Leave a box empty and Yojika puts back the standard prefix for that series.
Two series cannot share a prefix. If you give your credit notes the same prefix as your sales bills, a bill and a credit note would both be numbered INV2025-26/0001 — the same number on two different documents. Yojika refuses that and tells you which two clash.
GST allows a bill number of at most 16 characters. A number is your prefix plus 12 more (INV + 2025-26/0001), so a prefix longer than 4 goes over. Yojika does not stop you — it shows the length under the box so you can decide. On a second device the number also carries a series letter, which adds two more characters.
Renaming part-way through a year splits that year’s series. If you have already issued bills this financial year, Yojika asks before renaming: the bills you have made keep their numbers, so the year ends up with two prefixes. It is easier to read your books if you rename on 1 April.
Your shop’s name, GST number and address are a separate card — see Edit your business profile.
Billing type
The Billing type card sets how prices are entered on a new bill:
- Incl. GST — you type the price the customer pays, and Yojika works the GST out of it. This is the usual choice for shops that price at MRP.
- Excl. GST — you type the price before tax, and Yojika adds the GST on top.
This is only the starting point. Every bill still has its own Incl. GST / Excl. GST switch, so you can change it for one bill without changing the setting. Opening an old bill always shows it the way it was saved — changing this setting never re-reads a bill you already made.
The counter resets every April
On 1 April each year, the running number goes back to 0001 and the financial year moves on (for example from 2025-26 to 2026-27). This is normal and expected for Indian shops — every new financial year starts a fresh bill series.
Why you cannot edit the number
The next number is chosen for you and cannot be typed in by hand. This keeps your series gap-free — there are never missing or repeated bill numbers, which keeps your records clean for GST.
Using more than one device
If you use Yojika on a second device, that device gets its own series letter (so a bill might look like INV2025-26/B/0042). This means two devices never end up with the same bill number. Each series is counted separately in your GST reports.